On the radiation gauge for spin-1 perturbations in Kerr-Newman spacetime
arXiv:2008.08550 · doi:10.1088/1361-6382/abc36f
Abstract
We extend previous work [arXiv:1908.09095] to the case of Maxwell's equations with a source. Our work shows how to construct a retarded vector potential for the Maxwell field on the Kerr-Newman background in a radiation gauge. As in our previous work, the vector potential has a "reconstructed" term obtained from a Hertz potential solving Teukolsky's equation with a source, and a "correction" term which is obtainable by a simple integration along outgoing principal null rays. The singularity structure of our vector potential is discussed in the case of a point particle source.
arXiv comment33 pages, 1 figure, v2: minor revisions
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